The heaviest naturally occurring element is: (1) Mercury (2) Poloni (3) Thorium (4) Uranium

The heaviest naturally occurring element is: (1) Mercury (2) Poloni (3) Thorium (4) Uranium
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(4) Uranium Explanation: The heaviest element in terms of heaviest per a given number of atoms is the element with the highest atomic weight. This is the element with the larg st number of protons, which is presently element 118, Unanoctium. Ununoctium is the heaviest element, but it is man-made. The heaviest naturally-occurring element is uranium (atomic number 92, atomic weight 238.0289).
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